The fractal geometry of landforms implies that landscapes can be viewed as systems of related rates of change between various geomorphic features of the landscape. Consequently, biological patterns and processes associated ...

Gene flow within a metapopulation depends on the reproductive success of dispersers after immigration, but few empirical studies have measured the reproductive contributions of dispersers from distinct natal populations. ...

The relation between reproductive effort and natural mortality rate was examined for 15 species of marine fish. The observed correlation relating the wet gonad somatic index (WGSI) to M was r = .831. For most species ...

This study described the distribution and feeding of juvenile salmon (<italic>Oncorhynchus</italic> spp.) and Pacific herring (<italic>Clupea pallasi</italic>) in Puget Sound to explore the potential for resource competition ...

Mating systems reflect the degree of sexual selection in the past and present. Sexual and natural selection operating before and during spawning and natural selection on offspring combine to determine patterns of individual ...

There is increasing scientific interest in empirically linking evolution to ecology, particularly in wild populations. Although evolutionary change is often thought to proceed slowly, the microevolutionary forces of ...

While general patterns in the juvenile outmigration of Pacific salmon are well known, the proximate mechanisms informing migration in individuals are still poorly understood. This thesis describes a complex of individually-based ...

<italic>Vibrio tubiashii</italic> (Vt) is a causative agent of vibriosis in molluscan bivalves. Recent re-emergence of vibriosis in economically valuable shellfish, such as the Pacific oyster (<italic>Crassostrea gigas</italic>) ...

The relative importance of environmental conditions and stock abundance in determining the productivity of fish stocks has been a subject of an on-going debate. The controversy can be formulated as four competing hypotheses: ...

Partial migration, the behavior pattern in which a portion of a population migrates while others do not, is a widespread phenomenon with ecological and evolutionary consequences. Most Coho Salmon (<italic>Oncorhynchus ...

Persisting in the pelagic is not easy. The physical environment of pelagic ecosystems is highly dynamic. Unlike terrestrial systems where habitat complexity is driven by physical structure (e.g., vegetation and terrain), ...

Willapa Bay, located in Southwestern Washington State (USA), is one of the rare intertidal locations where large-scale pesticide applications occur. Since the 1960s, carbaryl has been applied to mudflats in Willapa Bay ...

Understanding relationships between predators and their prey is a central question in ecology and ecosystem management. For seabirds, relationships between food availability and breeding success and survival are typically ...

Removal of riparian vegetation can alter salmonid production in streams. This study examined relationships linking fish production with riparian vegetation, excluding those associated with physical disturbance of habitat.Bear ...

Thyroid activity is regulated by the hypothalamic-pituitary-thyroid axis. Using a recently developed radioimmunoassay (RIA) for coho salmon (Oncorhynchus kisutch) thyroid stimulating hormone (TSH), an in vitro pituitary ...

The snow crab (<italic>Chionoecetes opilio</italic>) population in the eastern Bering Sea historically supported a lucrative fishery, but was declared overfished in 1999. The subsequent rebuilding plan did not rebuild the ...

Whale watching has become increasingly popular as an ecotourism activity around the globe and is beneficial for environmental education and local economies. Southern Resident killer whales (Orcinus orca) comprise an ...

Reproductive success in pink salmon was investigated by examining the complex interactions among life history, morphological, and behavioral traits and their influence on offspring production. Reproductive success was ...